Lady Justice and the Ghost Whisperer

What do a Confederate soldier who died on the field of battle, a woman who was driven from her home by the ravages of the Civil War, and a man who perished in a turn-of-the-century asylum have in common? They all contact private investigator, Walt Williams. A bizarre series of events surrounding these paranormal visits culminate in the discovery of a terrorist plot to detonate bombs at a crowded festival.